Rick's field notes mention the accession Hda. Carrizal as typical northern Peru hirsutum, but the Abra de
Porculla collection is described as "odor not typical and organs smaller than normal." Again this may
indicate transition types and interbreeding with other populations. The presence of parrot swarms all
over this area is a distribution factor that should be studied here as well as in the Ayacucho-Pampas-
Apurimac complex of L. chmielewski and L. parviflorum.
The collections from Sana are noteworthy because they have been made only by Raymondi in 1874
when a route through this valley to and from Cajamarca was apparently common but is seldom used
today. A recent collection would be useful since the whole region from Trujillo to Chiclayo is transitional
in vegetation.
3. Watershed: Jequetepeque
(Table 7, fig. 3)
The Jequetepeque river is intermediate in length (about like the Cañete). The amount of water is
relatively small and seasonal, there being no water in the lower part during the June to November
period. In the ascent of the valley the first 1800 m is gained gradually, the next 1000 in 60 kms while
the rest of the climb is very rapid. The two tributaries that form the Jequetepeque start near the town of
Cajamarca. At the city itself a river of the same name originates which drains into the Crisnejas, and
farther on into the Marañon, thus it belongs to the eastern side of the Andes (fig. 4). The Abra here
(Gavilan) is at 2800 m. This area needs to be included in the study of inter-divide migration of green-
fruited species.
In the Jequetepeque, the two ecological zones characteristic of western Andean drainages are
unusually well defined. It is the first watershed to display vegetation of the northern desert type
(including "sapote" and algarrobo") in its coastal section. The lower delta has a fair amount of highly
developed rice cultivation, but little area for L. pimpinellifolium to develop. This species extends along the
river up to 1500 m (Magdalena). The quebrada of the upper zone is long, narrow, and dry, with
characteristic xerophytic vegetation (cactus species) and at its upper reaches changes to a very steep
ascent to the pass (Abra Gavilan), which opens into the Cajamarca Valley.
Up to Tembladera (500 m) rice is almost the only crop, then the typical "quebrada" mixture of corn,
fruits (avocado, banana, mango, grapes, apple), beans, loctau, peas, etc. in small plots (1-5 ha) is found.
Observations on Lycopersicon spp.
a. L. peruvianum is found here in two forms, var. typicum and var. humifusum. The particular
relationship of humifusum with other L. peruvianum populations has been described by Rick (1963). It
appears that var. humifusum is the mountain race of the Jequetepeque watershed.
b. L. hirsutum has been found where the needed humid conditions prevail (Rupe, LA 1352); only the
typicum form appears here.
4. Watershed: Chicama
(Table 8, fig. 3, 4)
The river Chicama is intermediate in size with two areas to be distinguished: 1) the large delta
almost exclusively planted to sugar cane; and 2) an upper mountainous section with the peculiar
ecology of endemic flora composed mainly of humid-loving plants such as Lycopersicon hirsutum, a
yellow-flowered Solanum, Fuchsia spp., and Irodea spp. L. peruvianum is not very common while L.
hirsutum is a dominant feature of the Contumaza-Cascas area and was collected here in 1875 by
Raimondi. Solanum pennellii occurs here in its northernmost limit. Unfortunately, the seed collected has
not provided material for study of the relation of these populations to others of the species.
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